• CB750.com is dedicated to the Honda CB750 SOHC and DOHC motorcycles and to their owners who love to ride, restore, and customize them.  All CB750 enthusiasts are welcome regardless of where you are from or whether you are into CB750 choppers, bobbers, cafe racers, drag bikes, or restorations.  Enjoy the site!
  • Happy New Year!

    It's the new year and we have a lot to look forward to in 2016! The site will be overhauled to keep up with the demand for new features, mobile compatibility, and security issues. Change is hard, but in this case necessary, and we hope the transition goes smoothly and makes for an even stronger community.

    If your resolution for the new year was like mine to de-clutter and organize, and you have boxes of CB750 parts you don't know what to do with, consider listing them in our Classifieds Section. It's simple and free. Register today if you're not already a member.

    Thank you to everyone who has helped to make this community great. Hopefully we have many more great years ahead. Happy New Year to you all!
  • Recent Forum Posts


    Take a working vac gauge hose like #3 and trade it with #4 and see if anything changes. Then another to be sure. Same with coils, swap the two coilpacks

    1981 CB750C custom carbs

    amc49 Today, 12:16 AM Go to last post

    please ask

    spoked rear wheel

    fingerprice Yesterday, 11:31 PM Go to last post

    Syncing the carbs the vacuum on 1 thru 3 on the dial was 30 on #4 it was 0..no movement. tried to adjust the jet in (all the way) or out and it didnt

    1981 CB750C custom carbs

    umacs4 Yesterday, 09:17 PM Go to last post

    Run the compression check again, the numbers make no sense. Think about the odds of ALL 4 cylinder readings ending at an even 8 for a number. Impossible.

    1981 CB750C custom carbs

    amc49 Yesterday, 07:09 PM Go to last post

    You can clean carbs till the end of this planet and might not be them.

    The engines are well known for valve problems due to them burning

    Bogging at 3000 rpm Keihin Carbs...

    amc49 Yesterday, 06:52 PM Go to last post

    I'm at the end of my rope here, I have had the carbs off 5 times now, apart back together, apart, back together.
    I've cleaned them ultrasonically

    Bogging at 3000 rpm Keihin Carbs...

    garbal Yesterday, 12:01 PM Go to last post